let $no_pushdown= set statement optimizer_switch='condition_pushdown_for_derived=off' for; create table t1 (a int, b int, c int); create table t2 (a int, b int, c int, d decimal); insert into t1 values (1,21,345), (1,33,7), (8,33,114), (1,21,500), (1,19,107), (5,14,787), (8,33,123), (9,10,211), (5,16,207), (1,33,988), (5,27,132), (1,21,104), (6,20,309), (6,20,315), (1,21,101), (8,33,404), (9,10,800), (1,21,123), (7,11,708), (6,20,214); insert into t2 values (2,3,207,207.0000), (1,21,909,12.0000), (7,13,312,406.0000), (8,64,248,107.0000), (6,20,315,279.3333), (1,19,203,107.0000), (8,80,800,314.0000), (3,12,231,190.0000), (6,23,303,909.0000); create table t1_double(a int, b double, c double); insert into t1_double values (1,23.4,14.3333), (1,12.5,18.9), (3,12.5,18.9), (4,33.4,14.3333), (4,14.3333,13.65), (5,17.89,7.22), (6,33.4,14.3), (10,33.4,13.65), (11,33.4,13.65); create table t2_double(a int, b double, c double); insert into t2_double values (1,22.4,14.3333), (1,12.5,18.9), (2,22.4,18.9), (4,33.4,14.3333), (5,22.4,13.65), (7,17.89,18.9), (6,33.4,14.3333), (10,31.4,13.65), (12,33.4,13.65); create table t1_char(a char, b char(8), c int); insert into t1_char values ('a','Ivan',1), ('b','Vika',2), ('b','Inga',6), ('c','Vika',7), ('b','Ivan',7), ('a','Alex',6), ('b','Inga',5), ('d','Ron',9), ('d','Harry',2), ('d','Hermione',3), ('c','Ivan',3), ('c','Harry',4); create table t2_char(a char, b char(8), c int); insert into t2_char values ('b','Ivan',1), ('c','Vinny',3), ('c','Inga',9), ('a','Vika',1), ('c','Ivan',2), ('b','Ali',6), ('c','Inga',2), ('a','Ron',9), ('d','Harry',1), ('b','Hermes',3), ('b','Ivan',11), ('b','Harry',4); create table t1_decimal (a decimal(3,1), b decimal(3,1), c int); insert into t1_decimal values (1,1,23),(2,2,11),(3,3,16), (1,1,12),(1,1,14),(2,3,15), (2,1,13),(2,3,11),(3,3,16); create table t2_decimal (a decimal(3,1), b decimal(3,1), c int); insert into t2_decimal values (2,1,13),(2,2,11),(3,3,16), (1,3,22),(1,3,14),(2,2,15), (2,1,43),(2,3,11),(2,3,16); create view v1 as select a, b, max(c) as max_c, avg(c) as avg_c from t1 group by a,b having max_c < 707; create view v2 as select a, b, max(c) as max_c, avg(c) as avg_c from t1 where t1.a>5 group by a,b having max_c < 707; create view v3 as select a, b, min(c) as min_c from t1 where t1.a<10 group by a,b having min_c > 109; create view v4 as select a, b, min(max_c) as min_c from v1 where (v1.a<15) group by a,b; create view v_union as select a, b, min(c) as c from t1 where t1.a<10 group by a,b having c > 109 union select a, b, max(c) as c from t1 where t1.b>10 group by a,b having c < 300; create view v2_union as select a, b, min(c) as c from t1 where t1.a<10 group by a,b having c > 109 union select a, b, max(c) as c from t1 where t1.b>10 group by a,b having c < 300 union select a, b, avg(c) as c from t1 where t1.c>300 group by a,b having c < 707; create view v3_union as select a, b, (a+1) as c from t1 where t1.a<10 union select a, b, c from t1 where t1.b>10 and t1.c>100; create view v4_union as select a, b, max(c)-100 as c from t1 where t1.a<10 group by a,b having c > 109 union select a, b, (c+100) as c from t1 where t1.b>10; create view v_double as select a, avg(a/4) as avg_a, b, c from t1_double where (b>12.2) group by b,c having (avg_a<22.333); create view v_char as select a, b, max(c) as max_c from t1_char group by a,b having max_c < 9; create view v_decimal as select a, b, avg(c) as avg_c from t1_decimal group by a,b having (avg_c>12); --echo # conjunctive subformula : pushing into HAVING let $query= select * from v1,t2 where (v1.max_c>214) and (t2.a>v1.a); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; let $query= select * from (select a, b, max(c) as max_c, avg(c) as avg_c from t1 group by a,b having max_c < 707) v1, t2 where (v1.a=t2.a) and (v1.max_c>300); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # extracted or formula : pushing into HAVING let $query= select * from v1,t2 where ((v1.max_c>400) and (t2.a>v1.a)) or ((v1.max_c<135) and (t2.a<v1.a)); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; let $query= select * from v1,t2 where ((v1.max_c>300) and (v1.avg_c>t2.d) and (v1.b=t2.b)) or ((v1.max_c<135) and (v1.max_c<t2.c) and (v1.a=t2.a)); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # conjunctive subformula : pushing into WHERE let $query= select * from v1,t2 where (v1.a>6) and (t2.b>v1.b); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; let $query= select * from v2,t2 where (v2.b>25) and (t2.a<v2.a); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # extracted or formula : pushing into WHERE let $query= select * from v1,t2 where ((v1.a>7) and (t2.c<v1.max_c)) or ((v1.a<2) and (t2.b<v1.b)); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; let $query= select * from v2,t2 where ((v2.a>7) and (t2.c<v2.max_c)) or ((v2.a>5) and (t2.b<v2.b)); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; let $query= select * from v1,t2 where ((v1.a>4) and (v1.b>t2.b) and (v1.max_c=t2.d)) or ((v1.a<2) and (v1.max_c<t2.c) and (v1.max_c=t2.d)); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # conjunctive subformulas : pushing into HAVING and WHERE let $query= select * from v1,t2 where (v1.a<2) and (v1.max_c>400) and (t2.b>v1.b); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; let $query= select * from v_double as v,t2_double as t where (v.a=t.a) and (v.avg_a>0.45) and (v.b>10); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; let $query= select * from v_decimal as v,t2_decimal as t where (v.a=t.a) and (v.avg_c>15) and (v.b>1); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # extracted or formula : pushing into HAVING and WHERE let $query= select * from v1,t2 where ((v1.a>7) and (v1.max_c>300) and (t2.c<v1.max_c)) or ((v1.a<4) and (v1.max_c<500) and (t2.b<v1.b)); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; let $query= select * from v1,t2 where ((v1.a<2) and (v1.max_c>120)) or (v1.a>7); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # extracted or formulas : pushing into WHERE and HAVING let $query= select * from v1,t2 where ((v1.a<2) and (v1.max_c>120) and (v1.b=t2.b)) or (v1.a>7); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; let $query= select * from v1,t2 where ((v1.a<2) and (v1.max_c<200) and (t2.c>v1.max_c) and (v1.max_c=t2.d)) or ((v1.a>4) and (v1.max_c<500) and (t2.b<v1.b) and (v1.max_c=t2.c)); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # prepare of a query containing extracted or formula prepare stmt from "select * from v1,t2 where ((v1.max_c>400) and (t2.a>v1.a)) or ((v1.max_c<135) and (t2.a<v1.a));"; execute stmt; execute stmt; deallocate prepare stmt; prepare stmt from "explain format=json select * from v1,t2 where ((v1.max_c>400) and (t2.a>v1.a)) or ((v1.max_c<135) and (t2.a<v1.a));"; execute stmt; execute stmt; deallocate prepare stmt; --echo # conjunctive subformula : pushing into WHERE --echo # pushing equalities let $query= select * from v1,t2 where (t2.a=v1.a) and (v1.b=t2.b) and (v1.a=1); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; let $query= select * from v1,t2 where (v1.a=5) and (v1.max_c=t2.d); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # conjunctive subformula : pushing into WHERE using equalities let $query= select * from v1,t2 where (t2.a<5) and (v1.a=t2.a); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; let $query= select * from v1,t2 where (v1.a=v1.b) and (v1.a=t2.a); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # conjunctive subformula : pushing into HAVING using equalities let $query= select * from v1,t2 where (t2.c>150) and (v1.max_c=t2.c); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # extracted and formula : pushing into WHERE --echo # pushing equalities let $query= select * from v1,t2 where (v1.a=v1.b) and (v1.a=t2.a) and (v1.a=3); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; let $query= select * from v1,t2 where (v1.a=1) and (v1.b=21) and (t2.a=2); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; let $query= select * from v_char as v,t2_char as t where (v.a='c') and (v.b<'Hermes') and ((v.b=t.b) or (v.max_c>20)); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # extracted and formula : pushing into WHERE using equalities --echo # pushing equalities let $query= select * from v_decimal as v,t2_decimal as t where (v.a=v.b) and (v.b=t.b) and ((t.b>1) or (v.a=1)); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # extracted or formula : pushing into HAVING using equalities let $query= select * from v1,t2 where ((t2.a<4) and (v1.a=t2.a)) or ((t2.c>150) and (v1.max_c=t2.c)); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # conjunctive subformulas : pushing into WHERE and HAVING using equalities let $query= select * from v1,t2 where ((t2.a>5) and (v1.a=t2.a)) and ((t2.c>250) and (v1.max_c=t2.c)); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # conjunctive subformulas : pushing into WHERE and HAVING --echo # pushing equalities let $query= select * from (select a, b, max(c) as max_c, avg(c) as avg_c from t1 group by a,b having max_c < 707) v1, t2 where (v1.a=8) and (v1.a=t2.a) and (v1.max_c=404); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # conjunctive subformulas : pushing into WHERE and HAVING let $query= select * from v1,t2 where (v1.a>3) and (v1.max_c>200) and (t2.b<v1.b) and (t2.d=v1.max_c); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # conjunctive subformula : pushing into WHERE --echo # extracted or formula : pushing into HAVING using equalities --echo # pushing equalities let $query= select * from v_double as v,t2_double as t where (v.b=v.c) and (v.c=t.c) and ((t.c>10) or (v.a=1)); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # conjunctive subformula : pushing into WHERE --echo # extracted or formula : pushing into HAVING using equalities let $query= select * from v_double as v,t2_double as t where (((v.a>0.2) or (v.b<17)) or (t.c>17)) and (t.c=v.c) and (v.c>18); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # extracted or formula : pushing into WHERE --echo # conjunctive subformula : pushing into HAVING --echo # pushing equalities let $query= select * from v_decimal as v,t2_decimal as t where (((v.a>4) or (v.a=2)) or (v.b>3)) and (v.avg_c=13); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; let $query= select * from (select a, b, max(c) as max_c, avg(c) as avg_c from t1 where t1.a>5 group by a,b having max_c < 707) v1, t2 where (v1.a=t2.a) and (v1.max_c>300) and (v1.a=v1.b); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # nothing to push let $query= select * from v1,t2 where (t2.a<2) and (t2.c>900); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; let $query= select * from v1,t2 where (v1.a=t2.a) and (v1.b=t2.b); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; let $query= select * from v1,t2 where (t2.a=v1.a) or (v1.b=t2.b) and ((v1.a=1) or (v1.a=6)); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; let $query= select * from v1,t2 where (v1.a=1) or (v1.b=21) or (t2.a=2); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; let $query= select * from v1,t2 where (t2.a<2) and (t2.c>900) and ((v1.a<t2.a) or (t2.a<11)); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # using several derived tables : nothing to push let $query= select * from v1,v2,t2 where (v1.a=v2.a) and (v1.a=t2.a) and (v2.b<50); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; let $query= select * from v1,v2,t2 where ((v1.a=v2.a) or (v1.a=t2.a)) and (t2.b<50) and (v1.b=v2.b); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; let $query= select * from v1,v2,t2 where ((v1.a=v2.a) and (v1.a=t2.a)) or ((v2.b>13) and (t2.c<115)); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # using several derived tables : pushing in all tables --echo # conjunctive subformula : pushing into HAVING --echo # extracted or formula : pushing into WHERE --echo # pushing equalities let $query= select * from v1,v2,t2 where ((v1.a=v2.a) or (v1.a=t2.a)) and ((v2.b<50) or (v2.b=19)) and (v1.max_c<300); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # using several derived tables : pushing only in one table --echo # conjunctive subformula : pushing into WHERE --echo # pushing equalities let $query= select * from v1,v2,t2 where (v1.a=t2.a) and (v1.a=v1.b) and (v1.a=v2.a) and (v2.max_c<300); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # using several derived tables : pushing only in one table --echo # extracted and formula : pushing into WHERE --echo # conjunctive subformula : pushing into WHERE using equalities --echo # pushing equalities let $query= select * from v1,v2,t2 where (v1.a=1) and (v1.b>10) and (v1.b=v2.b); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # extracted or formula : pushing into WHERE --echo # conjunctive subformula : pushing into WHERE using equalities --echo # pushing equalities let $query= select * from v_char as v,t2_char as t where (v.a=t.a) and (t.a='b') and ((v.b='Vika') or (v.b='Ali')); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # using several derived tables : pushing in all tables --echo # extracted or formula : pushing into WHERE --echo # conjunctive subformulas : pushing into HAVING --echo # pushing equalities let $query= select * from v1,v2,v3,t2 where ((v1.a=v2.a) or (v1.a=t2.a)) and ((v3.b<50) or (v3.b=33)) and (v1.max_c<500) and (v3.a=t2.a) and (v2.max_c>300); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # using several derived tables : pushing in all tables --echo # conjunctive subformulas : pushing into HAVING let $query= select * from (select a, b, max(c) as max_c, avg(c) as avg_c from t1 where t1.a>5 group by a,b having max_c < 707) v1, (select a, b, min(c) as min_c from t1 where t1.a>5 group by a,b having min_c < 707) v2, t2 where (v1.a=v2.a) and (v1.b=t2.b) and (v1.max_c>130) and (v2.min_c<130); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # using several derived tables : pushing in all tables --echo # extracted or formulas : pushing into HAVING --echo # conjunctive subformula : pushing into HAVING let $query= select * from (select a, b, max(c) as max_c, avg(c) as avg_c from t1 where t1.a>5 group by a,b having max_c < 707) v1, (select a, b, min(c) as min_c from t1 where t1.a>5 group by a,b having min_c < 707) v2, (select a, b, avg(c) as avg_c from t1 where t1.a<8 group by a,b) v3, t2 where (v1.a=v2.a) and (v1.b=v3.b) and ((v3.avg_c>170) or (v3.a<5)) and ((v1.avg_c<400) or (v1.a>1)) and (v2.min_c<200); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # extracted or formula : pushing into HAVING --echo # conjunctive subformula : pushing into WHERE let $query= select * from (select a, b, max(c) as max_c, avg(c) as avg_c from t1 group by a,b having max_c < 707) v1, t2 where ((v1.a=1) or (v1.max_c<300)) and (v1.b>25); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # extracted and formula : pushing into WHERE --echo # conjunctive subformula : pushing into HAVING let $query= select * from (select a, b, max(c) as max_c, avg(c) as avg_c from t1 where t1.a>5 group by a,b having max_c < 707) v1, t2 where (v1.a=t2.a) and (v1.max_c>300) and (v1.b<30); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # using query with union --echo # conjunctive subformula : pushing into WHERE --echo # conjunctive subformulas : pushing into HAVING and WHERE let $query= select * from v1,t2 where (v1.a<5) and (v1.b=t2.b) and (t2.c>800) union select * from v1,t2 where (v1.max_c>100) and (v1.a>7) and (t2.d>800); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # using query with union --echo # extracted and formula : pushing into WHERE --echo # extracted or formula : pushing into HAVING --echo # pushing equalities let $query= select * from v1,t2 where (v1.a<5) and (v1.b=t2.b) and (v1.b=19) union select * from v1,t2 where ((v1.max_c>400) or (v1.avg_c>270)) and (v1.a<t2.a); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # using query with union --echo # extracted or formula : pushing into HAVING --echo # extracted or formula : pushing into WHERE --echo # pushing equalities let $query= select * from v1,t2 where ((t2.a=v1.a) or (v1.b=t2.b)) and ((v1.a=1) or (v1.a=6)) union select * from v1,t2 where ((v1.a>3) and (v1.b>27)) or (v1.max_c>550); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # using query with union --echo # extracted or formula : pushing into HAVING --echo # conjunctive subformulas : pushing into WHERE --echo # pushing equalities let $query= select * from v1,t2 where ((v1.a=1) and (v1.a=t2.a)) and ((v1.max_c<500) or (v1.avg_c>500)) union select * from v2,t2 where ((v2.a<t2.b) or (v2.max_c>200)) and (v2.b>10) and (t2.a<2) union select * from v2,t2 where (v2.max_c=t2.c) and (v2.b<10); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # using derived table with union --echo # conjunctive subformulas : pushing into WHERE and HAVING let $query= select * from v_union,t2 where (v_union.a<3) and (v_union.c>100); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # using derived table with union --echo # conjunctive subformula : pushing into WHERE --echo # extracted or formula : pushing into HAVING let $query= select * from v_union,t2 where ((v_union.a<2) or (v_union.c>800)) and (v_union.b>12); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # using derived table with union --echo # conjunctive subformula : pushing into HAVING --echo # conjunctive subformula : pushing into WHERE --echo # pushing equalities let $query= select * from v_union,t2 where (v_union.a=1) and (v_union.a=t2.a) and (v_union.c<200); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; let $query= select * from v_char as v,t2_char as t where (v.a=t.a) and (v.b='Vika') and (v.max_c>2); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # using derived table with union --echo # using several derived tables : pushing in all tables --echo # conjunctive subformula : pushing into WHERE using equalities --echo # pushing equalities let $query= select * from v_union,v1,t2 where (v_union.a=v1.a) and (v1.a=t2.a) and (t2.a=1) and ((v_union.c>800) or (v1.max_c>200)); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # using derived table with union --echo # extracted or formula : pushing into WHERE --echo # conjunctive subformula : pushing into HAVING --echo # pushing equalities let $query= select * from v2_union as v,t2 where ((v.a=6) or (v.a=8)) and (v.c>200) and (v.a=t2.a); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # using derived table with union of selects without aggregation --echo # extracted conjunctive predicate: pushing in WHERE of both selects let $query= select * from v3_union as v,t2 where (v.a=t2.a) and (v.c>6); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # using derived table with union of selects without aggregation --echo # extracted conjunctive OR subformula: pushing in WHERE using equalities let $query= select * from v3_union as v,t2 where (v.a=t2.a) and ((t2.a>1) or (v.b<20)); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # using derived table with union of selects without aggregation --echo # extracted the whole condition: in WHERE of both selects let $query= select * from v3_union as v,t2 where (v.a=t2.a) and ((v.b=19) or (v.b=21)) and ((v.c<3) or (v.c>600)); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # using derived table with union of --echo # a select without aggregation and a select with aggregation --echo # extracted conjunctive predicate: pushing in WHERE of both selects let $query= select * from v4_union as v,t2 where (v.a=t2.a) and (v.b<20); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # using derived table with union of --echo # a select without aggregation and a select with aggregation --echo # extracted subformula: pushing in WHERE of one select --echo # extracted subformula: pushing in HAVING of the other select --echo # extracted sub-subformula: pushing in WHERE of the other select --echo # using an equality in all pushdowns let $query= select * from v4_union as v,t2 where (v.a=t2.a) and ((t2.a<3) or (v.b<40)) and (v.c>500); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # using embedded derived table : pushing the same conditions --echo # using several derived tables : pushing in all tables --echo # conjunctive subformula : pushing into WHERE --echo # extracted and formula : pushing into WHERE let $query= select * from v4,v1 where (v4.a<13) and (v1.a>5) and (v1.b>12); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # using embedded view : nothing to push --echo # using several derived tables : pushing only in one table --echo # conjunctive subformula : pushing into WHERE let $query= select * from v4,v1,t2 where (v4.a=t2.a) and (v4.a=v1.a) and (v1.b>30); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # using embedded view : pushing different conditions --echo # using several derived tables : pushing in all tables --echo # conjunctive subformula : pushing into WHERE using equalities --echo # extracted and formula : pushing into WHERE using equalities --echo # conjunctive subformula : pushing into HAVING let $query= select * from v4,v1,t2 where (v4.a=t2.a) and (v4.a>1) and (v4.a=v1.a) and (v4.min_c>100) and (v1.b<30); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # using embedded view : pushing different conditions --echo # using several derived tables : pushing in all tables --echo # extracted or formula : pushing into WHERE --echo # conjunctive subformula : pushing into HAVING let $query= select * from v4,v1,t2 where (((v4.b>10) and (v4.a>1)) or (v4.b<20)) and (v1.max_c>200) and (v1.a=v4.a); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # using embedded view : pushing different conditions --echo # using several derived tables : pushing only in one table --echo # extracted or formula : pushing into WHERE --echo # extracted or formula : pushing into HAVING let $query= select * from v4,v2 where ((v4.a>12) and (v4.min_c<300) and (v4.b>13)) or (v4.a<1); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # using embedded view : pushing different conditions --echo # using several derived tables : pushing only in one table --echo # conjunctive subformula : pushing into WHERE --echo # conjunctive subformula : pushing into HAVING --echo # pushing equalities let $query= select * from v4,v2 where (v4.a=v2.b) and (v4.a=v4.b) and (v4.min_c<100); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # using embedded view : pushing the same conditions --echo # using several derived tables : pushing in all tables --echo # extracted and formula : pushing into WHERE using equalities --echo # conjunctive subformula : pushing into WHERE --echo # pushing equalities let $query= select * from v4,v2 where (v4.a=v2.b) and (v4.a=v4.b) and (v2.b<30); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # using embedded view : pushing the same conditions --echo # using several derived tables : pushing in all tables --echo # extracted or formula : pushing into WHERE using equalities --echo # extracted and formula : pushing into WHERE using equalities --echo # pushing equalities let $query= select * from v4,v2 where (v4.a=v2.b) and (v4.a=v4.b) and ((v2.b<30) or (v4.a>2)); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # using embedded view : pushing the same conditions --echo # using several derived tables : pushing in all tables --echo # extracted or formula : pushing into WHERE --echo # conjunctive subformula : pushing into WHERE --echo # pushing equalities let $query= select * from v4,v2 where (((v4.a<12) and (v4.b>13)) or (v4.a>10)) and (v4.min_c=v2.max_c) and (v4.min_c>100); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; --echo # using embedded view : pushing the same conditions --echo # using several derived tables : pushing only in one table --echo # extracted or formula : pushing into WHERE let $query= select * from v4,v2,t2 where (((v4.a<12) and (t2.b>13)) or (v4.a>10)) and (v4.min_c=t2.c) and (t2.c>100); eval $no_pushdown $query; eval $query; eval explain $query; eval explain format=json $query; drop view v1,v2,v3,v4; drop view v_union,v2_union,v3_union,v4_union; drop view v_double,v_char,v_decimal; drop table t1,t2,t1_double,t2_double,t1_char,t2_char,t1_decimal,t2_decimal; --echo # --echo # MDEV-10782: condition extracted from a multiple equality --echo # pushed into HAVING --echo # CREATE TABLE t1 (i int); INSERT INTO t1 VALUES (1),(2); EXPLAIN EXTENDED SELECT * FROM ( SELECT * FROM ( SELECT MIN(i) as f FROM t1 ) sq1 ) AS sq2 WHERE f = 8; SELECT * FROM ( SELECT * FROM ( SELECT MIN(i) as f FROM t1 ) sq1 ) AS sq2 WHERE f = 8; SELECT * FROM ( SELECT * FROM ( SELECT MIN(i) as f FROM t1 ) sq1 ) AS sq2 WHERE f = 1; DROP TABLE t1; --echo # --echo # MDEV-10783: pushdown into constant view --echo # CREATE TABLE t1 (i int) ENGINE=MyISAM; CREATE VIEW v AS SELECT 5; SELECT * FROM t1 WHERE 1 IN ( SELECT * FROM v ); DROP VIEW v; DROP TABLE t1; --echo # --echo # MDEV-10785: second execution of a query with condition --echo # pushed into view --echo # CREATE TABLE t1 (i int); CREATE VIEW v1 AS SELECT i FROM t1 WHERE i < 5; CREATE FUNCTION f (in1 int) RETURNS int RETURN in1; CREATE VIEW v2 AS SELECT * FROM v1 GROUP BY i; PREPARE stmt FROM "SELECT * FROM v2 WHERE f(0) <> 2"; EXECUTE stmt; EXECUTE stmt; DROP FUNCTION f; DROP VIEW v2,v1; DROP TABLE t1; --echo # --echo # MDEV-10884: condition pushdown into derived specified by --echo # 1. unit with SELECT containing ORDER BY ... LIMIT --echo # 2. unit containing global ORDER BY ... LIMIT --echo # create table t1(a int); insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); select a from t1 order by a limit 5; set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from (select a from t1 order by a limit 5) t where t.a not in (1,2,3); set statement optimizer_switch='condition_pushdown_for_derived=on' for select * from (select a from t1 order by a limit 5) t where t.a not in (1,2,3); select a from t1 where a < 4 union select a from t1 where a > 5 order by a limit 5; set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from (select a from t1 where a < 4 union select a from t1 where a > 5 order by a limit 5) t where t.a not in (2,9); set statement optimizer_switch='condition_pushdown_for_derived=on' for select * from (select a from t1 where a < 4 union select a from t1 where a > 5 order by a limit 5) t where t.a not in (2,9); drop table t1; --echo # --echo # MDEV-11072: pushdown of the condition obtained --echo # after constant row substitution --echo # CREATE TABLE t1 (a INT); CREATE TABLE t2 (b INT); CREATE OR REPLACE VIEW v2 AS SELECT * FROM t2; CREATE TABLE t3 (c INT); CREATE OR REPLACE ALGORITHM=TEMPTABLE VIEW v3 AS SELECT * FROM t3; SELECT * FROM t1 WHERE a IN ( SELECT b FROM v2 WHERE b < a OR b IN ( SELECT c FROM v3 WHERE c = a ) ); INSERT INTO t1 VALUES (2); INSERT INTO t2 VALUES (3), (2); INSERT INTO t3 VALUES (4), (1), (2), (7); SELECT * FROM t1 WHERE a IN ( SELECT b FROM v2 WHERE b < a OR b IN ( SELECT c FROM v3 WHERE c = a ) ); EXPLAIN FORMAT=JSON SELECT * FROM t1 WHERE a IN ( SELECT b FROM v2 WHERE b < a OR b IN ( SELECT c FROM v3 WHERE c = a ) ); DROP VIEW v2,v3; DROP TABLE t1,t2,t3;